iPhone Xfinity App Issues

I have an IPhone 15 and cannot login to either my Xfinity account app OR the Xfinity Stream app. I have the latest apps (with Xfinity just updating it 3 days ago). Even time I try and login in after I enter my username it comes up with “access denied” then some long information.

why is this happening???? I have no issues with my Apple tablet.

thank you